Utilize este identificador para referenciar este registo: http://hdl.handle.net/10400.14/7485
Título: Degradation kinetics of colour, vitamin C and drip loss in frozen broccoli (Brassica oleracea L. ssp. Italica) during storage at isothermal and non-isothermal conditions
Outros títulos: Cinétique de détérioration de la couleur, de la teneur en vitamine C et exsudats du brocoli (Brassica oleracea L. ssp. Italica) pendant l’entreposage sous des conditions isothermes et non isothermes
Autor: Gonçalves, Elsa M.
Abreu, Marta
Brandão, Teresa R.S.
Silva, Cristina L.M.
Palavras-chave: Broccoli
Freezing
Storage
Quality
Storage life
Modelling
Data: 2011
Editora: Elsevier
Citação: GONÇALVES, Elsa M... [et al.] - Degradation kinetics of colour, vitamin C and drip loss in frozen broccoli (Brassica oleracea L. ssp. Italica) during storage at isothermal and non-isothermal conditions.International Journal of Refrigeration. ISSN 0140-7007. Vol. 34, n.º 8 (2011), p. 2136–2144
Resumo: Studies were undertaken on colour CIE L*a*b* values, vitamin C (ascorbic acid) and drip loss alterations of frozen broccoli (Brassica oleracea L. ssp. Italica) stored at isothermal ( 7, 15, and 25 C) and non-isothermal (accelerated life testing with step-stress methodology; temperature range from 30 to 5 C) conditions. The storage temperatures were selected according to conditions that occur in the cold chain. Frozen storage at all regimes had significant impact on all quality parameters analysed. Significant alterations in broccoli green colour, vitamin C content and drip loss were observed. Experimental data of h* colour degradation and drip loss (%) at isothermal conditions and a =a0 at non-isothermal conditions could be modelled by zero order kinetics. A first order kinetic model was adequate for the remaining quality factors and temperature regimes. The effect of storage temperature on kinetic parameters was successfully described by the Arrhenius equation.
Peer review: yes
URI: http://hdl.handle.net/10400.14/7485
Versão do Editor: http://www.sciencedirect.com/science/article/pii/S0140700711001514
Aparece nas colecções:CBQF - Artigos em revistas internacionais com Arbitragem / Papers in international journals with Peer-review

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